Auth bypass in Morelmathieuj Scheduler Widget
CVE-2026-1987
The Scheduler Widget plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 0.1.6. This is due to the `scheduler_widget_ajax_save_event()` function lacking proper authorization checks and ownership verification when updating events. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify any event in the scheduler via the `id` parameter granted they have knowledge of the event ID.
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.003 (23.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
Affected products
- Morelmathieuj Scheduler Widget — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-1987?
- CVE-2026-1987 is a medium-severity vulnerability in Morelmathieuj Scheduler Widget, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-02-14.
- How severe is CVE-2026-1987?
- Medium severity. CVSS v3 base score is 5.4 out of 10.